Move rng.{cpp,h} from core to rng/ topdir

Add a new class AutoSeeded_RNG that is a RandomNumberGenerator that wraps
up the logic formerly in RandomNumberGenerator::make_rng. make_rng in
fact now just returns a new AutoSeeded_RNG object.

AutoSeeded_RNG is a bit more convenient because

- No need to use auto_ptr
- No need to dereference (same syntax everywhere - it's an underestimated
advantage imo)

Also move the code from timer/timer_base to timer/

1 files changed, 42 insertions, 0 deletions

diff --git a/src/rng/auto_rng/auto_rng.h b/src/rng/auto_rng/auto_rng.h
new file mode 100644
index 000000000..bbc3703c1
--- /dev/null
+++ b/src/rng/auto_rng/auto_rng.h
@@ -0,0 +1,42 @@
+/*************************************************
+* Auto Seeded RNG Header File                    *
+* (C) 2008 Jack Lloyd                            *
+*************************************************/
+
+#ifndef BOTAN_AUTO_SEEDING_RNG_H__
+#define BOTAN_AUTO_SEEDING_RNG_H__
+
+#include <botan/rng.h>
+#include <botan/base.h>
+
+namespace Botan {
+
+/**
+* RNG that attempts to seed itself
+*/
+class BOTAN_DLL AutoSeeded_RNG : public RandomNumberGenerator
+   {
+   public:
+      void randomize(byte out[], u32bit len)
+         { rng->randomize(out, len); }
+      bool is_seeded() const
+         { return rng->is_seeded(); }
+      void clear() throw() { rng->clear(); }
+      std::string name() const
+         { return "AutoSeeded(" + rng->name() + ")"; }
+
+      void reseed() { rng->reseed(); }
+      void add_entropy_source(EntropySource* es)
+         { rng->add_entropy_source(es); }
+      void add_entropy(const byte in[], u32bit len)
+         { rng->add_entropy(in, len); }
+
+      AutoSeeded_RNG();
+      ~AutoSeeded_RNG() { delete rng; }
+   private:
+      RandomNumberGenerator* rng;
+   };
+
+}
+
+#endif